Improved heater and boiler



Patented July Z1861.

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' Wi'inesses UNITED STATES PATENT @EEicE.

SAMUEL A. IVILLETT, OF PHILADELPHIA, PENNSYLVANIA.

IMPROVED HEATER AND BOILER.

Specification forming part of Letters Patent No. 32,731, dated July 2, 1861.

To all whom it may concern:

Be it known that I, SAMUEL A. IVILLETT, of Philadelphia, Pennsylvania, have invented a Combined Heater and Boiler; and I do hereby declare the following to be a full, clear, and exact description of the same, reference being had to the accompanying drawings, and to the letters of reference marked thereon.

My invention consists of a hollow fire-pot combined, in the manner described hereinafter, with an inner and outer casing, so as to form a heater, and with a boiler, so as to maintain a constant supply of warm water therein.

In order to enable others skilled in the art to make and use my invention, I will now proceed to describe its construction and operation.

On reference to the accompanying drawings, which form a part of this specification, Figure 1 is a side view, partly in section, and Fig. 2 a ground plan, of my combined heater and boiler.

A is the exterior casing, and B the interior casing, of that portion of my invention which constitutes the heater.

O is a hollow fire-pot, the exterior of which may be formed by a continuation of the casing B, d being the inner casing, and the two casings being connected together above and below, so as to form a perfectly steam and water tight annular space surrounding the fuel, which is supported by an ordinary grate, 00.

011 the upper edge of the iire-pot, and within the inner casing, B, is formed an annular air-chamber, c, communicating through any suitable number of openings with the space between the inner and outer casings of the heater, and having on its inner edge a series of perforations.

The two casings A and B are connected together at the bottom by a plate, I), in which are a number of air-openings, the whole resting on the ash-pit D, which has a suitable door, f, and which is furnished with appro priate legs, a a.

Fuel is furnished to the fire-pot through a passage, E, closed in front by a suitable door, 71, and F is the outlet for the passage of the products of combustion to the chimney.

The inner casing is entirely closedat the top with a suitable eoverplate, i, and the outer casing is surmounted with a plate, G, in the center of which is an opening, 471, edged with a flange for receiving the pipe through which the hot air passes to the different apartments of the building in which the heater is situated.

H is a plain cylindrical boiler, closed at each end, rendered perfectly steam and water tight, and furnished with a suitable safetyvalve, I.

L and M are two pipes, forming an upper and lower communication between the interior of the boiler and that of the fire-pot, and P is the supply-pipe, which terminates a short distance above the bottom of the boiler, as shown by dotted lines, Q being the outletpipe, through which warm water is forced to the different apartments of the building.

The fuel being fully ignited, the cold air will pass through the openings in the plate I) upward through the space between the eX- terior casing, A, and inner casing, B, and by contact with the latter will become thoroughly heated before it is discharged through the opening m and through the hot-air pipes communicating therewith. A portion of this heated air passes into the annular air-chamber e, and thence through the perforations of the latter, so as to mingle with and ignite the gaseous products of combustion.

It should be understood that the inlet-pipe Q affords an uninterrupted communication between the hydrant, tank, or other source from whence the cold water is derived and the boiler, there being a constant flow of cold water under pressure into the boiler, so that the latter is always full. By means of the two pipes L and M a constant circulation of water is maintained between the interior of the hollow fire-pot and the boiler, so that the water in the latter is always retained at nearly the same degree of temperature as that in the hollow firepot. On opening a cock connected with the outlet-pipe Q a stream of water will be forced from the boiler to a height depending upon the pressure within the boiler, which may be regulated to suit the altitude to which the water has to be forced.

I wish it to be'understood that I do not de sire to claim any of the within -described parts viewed separately, but that I limit my claim to and desire to secure by Letters Pat- In testimony whereof Ihave signed my name ent forto this specification in the presence of two sub The hollow fire-pot C, when combined with scribing Witnesses. the inner casing, B, and outercasing, A, and SAMUEL A. VILLETT. with the boiler H and its inlet and outlet WVitnesses: pipes by means of the pipes L and M, as and HENRY HOWSON, for the purpose set forth, JOHN VVHITE. 

